I'm trying to wire up this old switch panel, but it looks different than the diagrams in Casey's book as far as I can tell.
This is a poor photo, but the left side has the positive going out to say, a light.
Are the right two terminals for positive and negative to the battery, respectively?
I was thinking I'd just have to send one positive and one negative wire to it, but maybe that's not the case. I'm also a little confused b/c this is a very old panel and has been used before, but the right terminals look like they'd require a soldered connection, but I see no signs of previous soldering on there.

I'm trying to wire up this old switch panel, but it looks different than the diagrams in Casey's book as far as I can tell.
This is a poor photo, but the left side has the positive going out to say, a light.
Are the right two terminals for positive and negative to the battery, respectively?
I was thinking I'd just have to send one positive and one negative wire to it, but maybe that's not the case. I'm also a little confused b/c this is a very old panel and has been used before, but the right terminals look like they'd require a soldered connection, but I see no signs of previous soldering on there.

I agree, get the new panel.
On the pic the fuse is on the left and the wire goes from the fuse to the left side of the switch. Note the left side of the switch has the same 2 connections and how the wires are attached. The right side of the switch is for the positive output to the load (gps, light, etc).
Lots of panels do not have a place for the grounds and it isn't necessary anyway as you're only switching the positive. Blue Seas 360 panels do not have ground connections as one example. They usa a separate connecting point, usually a small bus or terminal block.

The panel that Bill linked to is a 360 series panel and as I posted the grounds go to a separate bus. The only reason there is a ground on the panel at all is for the led indicator lights. From the manual for the Blue Seas panel:

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